Powerocks Thunder 9000mAh Portable Charger - High Capacity Power Bank for iPhone, Samsung, Android Devices | Fast Charging External Battery Pack for Travel, Camping, Emergency Backup

Seems to be everything it promises to be. Much better made than the no-name power brick I tried before it. I thought maybe the 9000 mAh rating was an "exaggeration" but it really seems to be in the ballpark. I used it to power a Raspberry Pi 3B with Wi-Fi and an LCD display, so I could go portable. Some power banks won't keep up with the current demand of a RPi 3B, but this one did. I have not timed the length it will do so, but a 30 minute test I did went OK, and that is probably about all I need.I WILL ORDER MORE OF THESE FOR MY FAMILY BEST PORTABLE CHARGER IVE EVER HAD LAST 2 DAYS AND CHARGES MY PHONE FAST ABOUT 4 TIMES BEFORE HAVING TO RECHARGEThese are the best. They hold a charge for a really long time. They come in a protective bag. Best we've ever bought.Great portable charger!! I like the compact size and that we can charge two phones at once.This is one of the best charger rocks I have foundGreat backup battery for Kindle and cellphone. Often times out on day trips its not always possible/convenient to plug in somewhere to juice up. I keep a couple of these in my everyday knapsack in case I need to power up my devices. They will recharge my phone multiple times and can run my kindle if needed for a couple of hours. TBH, I have never really driven one of these to exhaustion, so I don't know exactly how long they will last. For the price ya cant really go wrong imho. I like the led lights on the side that act like fuel gauges to let you know how much juice is left. Only real downside is that depending on the charger they can take some time to recharge, say 4-5 hours. Not a big deal to me.Dang it, now I'm gonna have to order another one, just because. /;-))